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Observing that somebody else approximately finds the same measurement result when measuring the same measurand, has provided great comfort to many people: being confirmed always gives a nice feeling. Thus, intercomparisons of measurement results obtained on the same measurand in the same material by different laboratories, are welcomed because they provide this feeling.. They are also interesting because they provide a simple and clear means to estimate the actual degree of reproducability of results attained by different laboratories. That is useful because a great many measurements on the same material are performed daily by pairs of laboratories and decizions on whether observed differences or discrepencies must be made . Knowing the usual degree of reproducability of measurement results between laboratories is extremely valuable in such cases. Large compensations may have to be paid on the basis of percieved differences in measurement results when they determine differences in values of goods.

However, does an interlaboratory comparison provide traceability of the results? To answer thos question , we first look at the definition of traceability and its scientific characteristics. Without a clear, unequivicol understanding of traceability, we cannot answer the question raized. .

Additional information

Authors: DE BIEVRE P, IRMM Ispra (IT)
Bibliographic Reference: Paper presented: CITAC International Symposium on Analytical QA in the 21st Century, Sydney (AU), October 15-16th 1998
Availability: Available from DG XIII as Paper EN 42072 ORA
Record Number: 199910393 / Last updated on: 1999-03-12
Original language: en
Available languages: en